Lactation: The process of milk production. Human milk is secreted by the mammary glands, which are located within the fatty tissue of the breast. The hormone oxytocin is produced in response to the birth of a new baby, and it both stimulates uterine contractions and begins the lactation process. For the first few hours of nursing, a special fluid c...Found on http://www.medterms.com/script/main/art.asp?articlekey=6202

(lak-ta´shәn) the secretion of milk by the breasts; it is thought to be brought about by action of progesterone and estrogen and specific pituitary hormones, such as lactogenic hormone (prolactin). It does not begin until at least 3 days after the birth of the baby; before that, and immediately after birth, ...Found on http://www.encyclo.co.uk/local/21001

secretion and yielding of milk by females after giving birth. The milk is produced by the mammary glands, which are contained within the breasts. ... [5 related articles]Found on http://www.britannica.com/eb/a-z/l/4

Lactation describes the secretion of milk from the mammary glands and the period of time that a mother lactates to feed her young. The process can occur with almost all post-pregnancy female mammals, although it predates mammals. In humans the process of feeding milk is also called breastfeeding or nursing. In most species, milk comes out of the m...Found on http://en.wikipedia.org/wiki/Lactation

Secretion of milk in mammals, from the mammary glands. In late pregnancy, the cells lining the lobules inside the mammary glands begin extracting substances from the blood to produce milk. The supply of milk starts shortly after birth with the production of colostrum, a clear fluid consisting largely of water, protein, antibodies, and vitamins. The...Found on http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0008177.html